Harold Calderon

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This Is Your Brai...
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How To Understand...
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Behave: The Biolo...
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See all 32 books that Harold is reading…
Book cover for The Sixth Extinction: An Unnatural History
Tropical waters tend to be low in nutrients, like nitrogen and phosphorus, which are crucial to most forms of life. (This has to do with what’s called the thermal structure of the water column, and it’s why tropical waters are often so ...more
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Scott Jurek
“Wanting to be someone else is a waste of the person you are. —KURT COBAIN”
Scott Jurek, Eat and Run: My Unlikely Journey to Ultramarathon Greatness

32144 Costa Rica — 562 members — last activity Apr 09, 2025 08:14AM
Grupo Oficial de Costa Rica
34146 SciFi and Fantasy eBook Club — 3773 members — last activity Feb 22, 2026 07:02PM
This is for those of us whose preferred format is the ebook ... So, Whether you're a Kindle, Nook, Sony, iPad, Google, or whatever person; come on in ...more
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Will
232 books | 64 friends

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